JP2012228814A - Method for manufacturing skin material and method for manufacturing vehicle interior material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a skin material that can perform molding without deteriorating designability of a skin material comprising natural leathers, and to provide a method for manufacturing a vehicle interior material with such skin materials.SOLUTION: There is contained a hot-press step of forming the skin material 20 to a steric shape by pressing the skin materials 20 that has a natural leather by a heated pressing member 62. In the hot-press step, a vertical wall to stand up from a peripheral edge of a non-design surface toward a surrounding surface is formed in the skin material 20 by pressing the non-design surface in the skin material 20 by heated pressing member 62, and by forming the skin material 20 so that the non-design surface becomes a shape arranged to the pressure direction side of the non-design surface by the pressing member 62 rather than a surrounding surface of the non-design surface in the skin material 20.

Description

  The present invention relates to a method for manufacturing a skin material and a method for manufacturing a vehicle interior material.

  2. Description of the Related Art Conventionally, as a method for manufacturing a skin material having a predetermined shape by covering the surface of a vehicle interior material, a method of hot pressing the skin material with a hot press mold is known (for example, Patent Document 1 below). According to the method of Patent Document 1, a shape (three-dimensional shape) corresponding to the uneven shape of the hot press mold is formed on the skin material by hot pressing the skin material with a hot press mold having an uneven shape.

Japanese Patent No. 4557135

  However, if the skin material having natural leather is subjected to hot pressing as in the above-mentioned patent document, the skin material may be shrunk as a result of being heated, which may cause wrinkles. In addition, there is a concern that a pattern (for example, a texture pattern or the like) that the skin material originally has disappears due to the heat press. For these reasons, there has been a problem that the design properties are lowered when hot pressing is performed on a skin material having natural leather.

  The present invention has been completed based on the above circumstances, and a method for producing a skin material that can be molded without reducing the design properties of a skin material made of natural leather. The purpose is to provide. Moreover, it aims at providing the manufacturing method of the interior material for vehicles provided with such skin material.

  In order to solve the above-mentioned problem, the method for producing a skin material of the present invention is a hot press step of forming the skin material into a three-dimensional shape by pressing the skin material having natural leather with a heated pressing member. In the hot press step, the non-design surface of the skin material is pressed by the heated pressing member, and the non-design surface is more than the peripheral surface of the non-design surface of the skin material. A standing wall that rises from the peripheral end of the non-design surface to the peripheral surface by forming the skin material so as to have a shape arranged on the pressing direction side of the non-design surface by the pressing member It is characterized by forming a part.

  In this invention, the standing wall part which stands | starts up from the peripheral end of a non-design surface is formed by pressing the non-design surface in a skin material with a press member. By forming such a standing wall portion, the three-dimensional shape of the skin material can be maintained. That is, the skin material can be formed into a three-dimensional shape. Thus, in the present invention, when the skin material is molded into a three-dimensional shape, the design surface is not hot-pressed. That is, it is possible to suppress a situation in which the design property is lowered while allowing the skin material to be formed by hot pressing.

  Further, the pressing member may have a shape that becomes narrower toward the opposite side to the pressing direction.

  When the heated pressing member is brought into contact with the non-design surface, the side surface of the pressing member (the surface opposite to the surface of the standing wall portion) is formed by making the pressing member thin as it goes in the direction opposite to the pressing direction. The situation which contacts the surface of a standing wall part can be suppressed. Thereby, the situation which erases the pattern which the skin material originally has on the surface of a standing wall part can be controlled.

  Next, in order to solve the above-mentioned problems, the method for manufacturing a vehicle interior material according to the present invention is a method for manufacturing a vehicle interior material in which a skin material made of natural leather is covered on a base material. The skin material is formed by pressing the skin material with a heated pressing member to form the skin material into a three-dimensional shape, and after the heat pressing step, covering the base material. A skin material attaching step for attaching a material to the substrate, and in the hot pressing step, the heated pressing member presses a non-design surface in the skin material, and the non-design surface is the skin The non-design material is formed on the skin material by forming the skin material so as to have a shape arranged on the pressing direction side of the non-design surface by the pressing member rather than the peripheral surface of the non-design surface in the material. From the peripheral edge of the surface to the surrounding surface Characterized in that to form the rising wall part.

  In the present invention, the design surface is not hot-pressed when the skin material is molded into a three-dimensional shape. That is, it is possible to suppress a situation in which the design property is lowered while allowing the skin material to be formed by hot pressing. Moreover, after shape | molding a skin material in a three-dimensional shape, a skin material can be easily attached with respect to a base material by attaching to a base material.

  Moreover, in the said skin material attachment process, attaching the said skin material to the said base material via the said foamable resin material by supplying a foamable resin material between the said base material and the said skin material, can do.

  If it does in this way, a skin material can be attached with respect to a base material simultaneously with interposing a foaming resin material between a base material and a skin material.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the skin material which can be shape | molded without reducing the designability with respect to the skin material which consists of natural leather can be provided. In addition, it is possible to provide a method of manufacturing a vehicle interior material provided with such a skin material.

The figure which looked at the instrument panel in this embodiment from the vehicles back The perspective view which shows the skin material in this embodiment Sectional drawing which shows the hot press process in this embodiment (corresponding to the figure cut | disconnected by the AA line of FIG. 2) Sectional drawing which shows the state which pressed the skin material with the pressing member Sectional drawing which shows the skin material attachment process in this embodiment Sectional drawing which shows the state which injected the foaming resin material between the base material and the skin material (corresponding to the figure cut | disconnected by the AA line of FIG. 2)

  An embodiment of the present invention will be described with reference to FIGS. In this embodiment, the instrument panel 10 is illustrated as a vehicle interior material. FIG. 1 is a view of an instrument panel 10 of a vehicle as viewed from the rear of the vehicle. Moreover, in FIG. 6, the cross-sectional structure of the instrument panel 10 is illustrated. As shown in FIG. 6, the instrument panel 10 has a structure in which a skin material 20, a cushion material 14, and a base material 16 are sequentially laminated from the front surface (design surface) side (the lower side in FIG. 6) to the back surface side. Yes. In addition, in this embodiment, the base material 16 which comprises the center part of the vehicle width direction in the instrument panel 10 and the skin material 20 which covers the base material 16 are illustrated.

  As the base material 16, polypropylene (PP) resin, PP resin containing PP resin reinforced with talc, mica or glass, modified polyphenylene oxide (PPO) resin, acrylonitrile butadiene styrene (ABS) resin, etc. Can be used. Moreover, as the cushion material 14, foamable resin materials, such as a foaming polyurethane and a foaming polyolefin, can be used.

  Next, the configuration of the skin material 20 will be described in detail. The skin material 20 is a skin material (genuine leather skin material) having natural leather. Such a skin material 20 includes, for example, a coating layer, a silver surface layer, and a fiber layer in order from the surface side. A pattern peculiar to genuine leather (for example, a texture pattern) is formed on the surface of the skin material 20. The silver layer constitutes a surface layer of genuine leather, and the genuine leather is constituted by the silver layer and the fiber layer. Genuine leather is finer as it goes from the back side to the front side of the skin material 20, and moisture is contained inside the genuine leather. The coating layer is coated for the purpose of protecting the silver surface layer of genuine leather.

  The fiber layer is configured by interlacing a plurality of fibers, and a gap is formed between these fibers. On the back surface (surface opposite to the silver surface layer) of the fiber layer, a thermoplastic resin (for example, acrylic resin) is impregnated in the gaps of the fibers and cured. Thereby, the skin material 20 has the structure hold | maintained in a fixed shape while having a softness | flexibility.

  FIG. 2 is a perspective view showing the skin material 20. The skin material 20 is formed in a three-dimensional shape that follows the surface shape of the instrument panel 10. Specifically, the skin material 20 includes a central portion 21 having an opening 22 (concave portion 25), side wall portions 23 extending from the peripheral edges on the left and right sides of the central portion 21 toward the front of the vehicle, and each side wall portion. A three-dimensional shape having a peripheral wall portion 24 extending from 23 to extend substantially in the direction in which the central portion 21 extends is formed.

  As shown in FIG. 1, the opening 22 formed in the central portion 21 is formed for attaching various devices such as the audio device 18 to the instrument panel 10. A square shape corresponding to the shape of the device 18 is formed.

  The skin material 20 has, for example, a sheet shape before being formed into a three-dimensional shape, and is heat-pressed by a first forming die 50 described later, thereby having the above-described side wall portion 23 and the peripheral wall portion 24. Molded into a shape. Further, the opening 22 of the skin material 20 is formed by cutting the bottom 25 </ b> A of the recess 25 after forming the recess 25 (see FIG. 2) in the central portion 21 with the first mold 50.

  That is, as shown in FIG. 2, the recess 25 is composed of a bottom portion 25 </ b> A and each side wall portion (recess side wall portion 26) that rises from four sides around the bottom portion 25 </ b> A. The bottom 25A is removed from the recess 25.

  In the skin material 20, the surface 25 </ b> A <b> 1 (surface on the front side) in the bottom portion 25 </ b> A and the surface 24 </ b> A in the peripheral wall portion 24 are non-design surfaces when attached to the instrument panel 10. The non-design surface as used herein refers to a surface that is not visually recognized by the passenger in the skin material 20 in a state (finished product state) installed in the vehicle.

  More specifically, since the bottom 25A of the skin material 20 is a portion that is cut off when the opening 22 is formed, the surface 25A1 is a non-design surface that is not visible to the passenger when installed in the vehicle. Become. Further, as shown in FIG. 1, the surface 24A of the peripheral wall portion 24 of the skin material 20 is configured to be covered from the vehicle interior side by each component 17 constituting the instrument panel 10, and as a result, to the passenger. It becomes a non-design surface that cannot be seen. In addition, in FIG. 1, the surrounding wall part 24 of the state distribute | arranged to the back side of each component 17 which comprises the instrument panel 10 is shown with the broken line. In addition, as each component 17 which comprises the instrument panel 10, a panel member, a meter, a glow box etc. can be illustrated, for example, However, It is not limited to these components.

  Next, the configuration of the first molding die 50 used to mold the skin material 20 into a three-dimensional shape (a shape corresponding to the surface shape of the instrument panel 10) will be described with reference to the drawings in FIGS. . As shown in FIGS. 3 and 4, the first mold 50 includes a lower mold 51 and an upper mold 61.

  The upper surface (the surface facing the upper mold 61) of the lower mold 51 has a shape that follows the shape of the back surface of the skin material 20. Specifically, as shown in FIG. 3, the central portion 52 of the lower die 51 protrudes toward the upper die 61, and a concave portion 54 that opens upward is formed in the central portion 52. ing. The recess 54 is for forming the recess 25 in the skin material 20 and has a square shape corresponding to the shape of the recess 25 of the skin material 20 in plan view.

  The upper surface 53 </ b> A of the peripheral end portion 53 in the lower mold 51 is disposed at a lower position than the upper surface 52 </ b> A of the central portion 52. A side surface 53B formed so as to connect the upper surface 53A of the peripheral end portion 53 and the upper surface 52A of the central portion 52 is formed to rise substantially vertically from the upper surface 53A of the peripheral end portion 53.

  The upper surface 52A of the central portion 52 is a molding surface for molding the central portion 21 of the skin material 20, and the upper surface 53A of the peripheral end portion 53 is a molding surface for molding the peripheral wall portion 24 of the skin material 20. It is said. Further, the side surface 53 </ b> B of the lower mold 51 is a molding surface for molding the side wall portion 23 of the skin material 20.

  The lower mold 51 is provided with a plurality of suction holes 55. As shown in FIG. 3, one end of each suction hole 55 is opened to each molding surface (upper surface 52A, upper surface 53A, side surface 53B). The other end side of each suction hole 55 is connected to a vacuum pump P attached to the lower mold 51. Accordingly, by operating the vacuum pump P, a negative pressure can be applied to the skin material 20 through each suction hole 55. As a result, the skin material 20 is lowered by sucking the skin material 20. It can be brought into close contact with each molding surface of the mold 51.

  The upper mold 61 is disposed so as to be opposed to the upper side of the lower mold 51, and is configured to be able to rise and descend (approach and separate from the lower mold 51). The upper mold 61 is formed with pressing members 62 and 65 that protrude toward the lower mold 51.

  The pressing member 62 on the center side is a member that is provided at a position facing the concave portion 54 of the lower mold 51 and heat-presses the skin material 20 with the concave portion 54 of the lower mold 51. As shown in FIGS. 3 and 4, the pressing member 62 has a substantially columnar shape, and its tip 63 can be fitted into the recess 54 of the lower mold 51, that is, in the plan view, the skin material 20. The shape of the planar view corresponding to the shape of the recess 25 in FIG.

  The pressing member 62 has a shape in which the base end portion 64 becomes narrower with respect to the tip end portion 63 in both the left-right direction in FIG. In other words, the pressing member 62 has a shape that becomes thinner as it goes upward (opposite to the pressing direction of the non-design surface by the pressing member).

  The pressing member 65 is provided at a position facing the peripheral end portion 53 of the lower mold 51, and is a member for hot pressing the skin material 20 between the upper surface 53A of the peripheral end portion 53 and the side surface 53B of the lower mold 51. It is. The pressing member 65 has a tip 66 corresponding to a corner formed by the upper surface 53 </ b> A and the side surface 53 </ b> B in the lower mold 51. The pressing member 65 has a shape in which the base end portion 67 becomes narrower in the left-right direction (width direction) of FIG. In other words, the pressing member 65 has a shape that becomes thinner as it goes upward (opposite to the pressing direction of the non-design surface by the pressing member).

  The upper die 61 has a built-in heater (not shown), and is configured to be able to heat the pressing member 62 and the pressing member 65 by operating the heater.

  Next, the configuration of the second molding die 70 used for attaching (joining) the skin material 20 molded into a three-dimensional shape to the base material 16 will be described with reference to the drawings of FIGS. The second mold 70 includes a lower mold 71 and an upper mold 81 provided so as to be openable and closable.

  As shown in FIG. 5, the upper surface 71 </ b> A (the surface facing the upper mold 81) of the lower mold 71 has a shape that follows the surface (design surface) shape of the molded skin material 20. It is set as the mounting surface to be mounted. The lower mold 71 is provided with a plurality of suction holes 75. As shown in FIG. 5, one end of each suction hole 75 is opened in a contact surface with the skin material 20 in the lower mold 71. The other end side of each suction hole 75 is connected to a vacuum pump P attached to the lower mold 71. As a result, the vacuum pump P is operated to apply a negative pressure to the skin material 20 through each suction hole 75, thereby sucking the skin material 20 and placing the skin material 20 on the mounting surface of the lower mold 71. It is possible to adhere.

  The upper die 81 is disposed so as to be opposed to the upper portion of the lower die 71 and is configured to be able to approach and separate from the lower die 71. The lower surface 81 </ b> A (the surface facing the lower mold 71) of the upper mold 81 has a shape that follows the shape of the back surface of the base material 16.

  Further, the second mold 70 includes a foaming agent supply device (not shown), and from the foaming agent supply device, a foamable resin material (for example, a polyol agent and an isocyanate agent, which are raw materials of a polyurethane material) is provided. Through a material supply hole (not shown) provided in the base material 16, it can be injected between the base material 16 and the skin material 20.

  Next, a method for manufacturing the instrument panel 10 according to the present embodiment, in particular, a method for manufacturing a portion of the instrument panel 10 to which the skin material 20 is affixed will be described with reference to FIGS. 3 to 6. The manufacturing method of the instrument panel 10 in the present embodiment includes a skin material manufacturing process including a heat press process for forming the skin material 20, a skin material mounting process for mounting the manufactured skin material 20 to the base material 16, and Is included.

<Skin material manufacturing process>
First, a liquid thermoplastic resin is applied from the fiber layer side to the base material of the skin material composed of a coating layer, a silver surface layer, and a fiber layer by using, for example, a roll coater type coating machine. . Thereby, the thermoplastic resin is impregnated into the fiber layer, and a sheet-like skin material 20 (a skin material before being formed into a three-dimensional shape) is formed.

<Hot press process>
Subsequently, the skin material 20 is molded into a three-dimensional shape using the first molding die 50. First, the vacuum pump P is operated in a state where the sheet material 20 is placed on the surface of the lower mold 51 facing the upper mold 61. Thereby, as shown in FIG. 3, the skin material 20 is sucked (evacuated) by the suction holes 55 and is brought into close contact with the molding surfaces of the lower mold 51. As a result, the skin material 20 is deformed into a three-dimensional shape following the molding surface (the upper surface 52A, the upper surface 53A, and the side surface 53B) of the lower mold 51.

  In this state, the skin material 20 is only temporarily deformed into a three-dimensional shape by the suction force of the vacuum pump P, and the three-dimensional shape of the skin material 20 is not maintained. In order to maintain the three-dimensional shape of the skin material 20, the skin material 20 needs to be hot-pressed by the pressing members 62 and 65 as described below.

  Subsequently, a heater (not shown) built in the upper die 61 is operated to heat the pressing members 62 and 65, respectively. In addition, the heating temperature of the pressing members 62 and 65 at this time is set to a temperature (for example, 80 ° C. to 130 ° C.) at which the thermoplastic resin impregnated by the skin material 20 is softened.

  Subsequently, the upper die 61 is lowered, and the non-design surfaces (the surface 25A1 of the bottom 25A and the surface 24A of the peripheral wall 24) of the skin material 20 are pressed by the heated pressing members 62 and 65, respectively.

  More specifically, the bottom portion 25A of the skin material 20 (and the lower portion of the recess side wall portion 26) is hot-pressed by the pressing member 62 and the inner surface of the recess 54. As a result, the surface 25A1 (non-design surface) of the bottom portion 25A is arranged below (the pressing direction side of the non-design surface by the pressing member) below the surface 21A (surrounding surface of the non-design surface) of the central portion 21. Thus, the skin material 20 is formed. As a result, in the skin material 20, the recessed sidewall portion 26 (standing wall portion) is formed so as to rise from the peripheral end of the bottom portion 25 </ b> A toward the surface 21 </ b> A of the central portion 21. Thereby, the shape of the recessed part 25 in the skin material 20 is hold | maintained.

  In addition, the pressing member 65 and the upper surface 53A and the side surface 53B of the peripheral end portion 53 heat-press the peripheral wall portion 24 and the lower portion of the side wall portion 23 (corner portions of the side wall portion 23 and the peripheral wall portion 24) in the skin material 20. Thereby, surface 24A (non-design surface) of peripheral wall part 24 was arranged below (the pressing direction side of the non-design surface by a press member) rather than surface 21A (periphery surface of a non-design surface) of central part 21. The skin material 20 is formed in a shape. As a result, a side wall portion 23 (standing wall portion) is formed on the skin material 20 so as to rise from the peripheral end of the peripheral wall portion 24 toward the surface 21 </ b> A of the central portion 21. From the above, the skin material 20 is formed into a three-dimensional shape by hot pressing with the pressing members 62 and 65, and the skin material 20 is completed.

  Here, “the skin material 20 is molded” refers to a state in which the three-dimensional shape of the skin material 20 is maintained. That is, it means a state in which the three-dimensional shape is maintained even when the vacuuming by the vacuum pump P is released. Further, “the standing wall portion is formed” means a state in which the standing wall portion is held in a shape rising from the peripheral end of the non-design surface. In addition, at the time of a hot press, the shaping | molding of the skin material 20 becomes easier because the thermoplastic resin contained in the skin material 20 softens with heat.

<Skin material attachment process>
Next, the skin material 20 molded by the hot pressing process is attached to the base material 16 using the second molding die 70. First, as shown in FIG. 5, the skin material 20 molded into a three-dimensional shape is placed on the upper surface 71 </ b> A of the lower mold 71 of the second mold 70 with the back surface thereof facing upward. Next, by driving the vacuum pump P, the skin material 20 is sucked (evacuated) by the suction holes 75 and is brought into close contact with the upper surface 71A of the lower mold 71. By attaching the base material 16 to be described later in a state where the skin material 20 is evacuated, the work can be performed while the shape of the skin material 20 is held more reliably.

  Next, the base material 16 is placed on the upper side of the skin material 20 such that the surface on the front side faces the back surface of the skin material 20. The base material 16 has a shape in which the central portion 16 </ b> B protrudes to the front side (the skin material 20 side) corresponding to the shape of the skin material 20. In the state where the base material 16 is placed on the upper side of the skin material 20, as shown in FIG. 6, the peripheral end portion 16C of the base material 16 and the peripheral wall portion 24 of the skin material 20 are in contact with each other without any gaps. A space S is formed between the center portion 21 of the skin material 20 and the side wall portions 23. In addition, the bottom portion 25 </ b> A of the skin material 20 is inserted into the through hole 16 </ b> A formed in the central portion 16 </ b> B of the base material 16.

  Next, as shown in FIG. 6, the upper die 81 is lowered and the second shaping die 70 is closed to press both the base material 16 and the skin material 20 with the upper die 81 and the lower die 71. State. Then, a foamable resin material (for example, a polyol agent and an isocyanate agent, which are raw materials of the polyurethane material) is supplied to the space S between the base material 16 and the skin material 20, and the foamable resin material is foamed to provide a space. Fill in S. The foamable resin material is not limited to the polyurethane material and can be changed as appropriate.

  Thereafter, the cushioning material 14 (foamable resin material) is integrally formed with the base material 16 and the skin material 20 by solidifying the foamable resin material. That is, the cushion material 14 is joined to the base material 16 and the skin material 20, so that the skin material 20 is attached to the base material 16 via the cushion material 14.

  Through the above steps, the instrument panel 10 in a state in which the skin material 20 is covered is formed on the base material 16. In addition, after the skin material 20 is attached to the base material 16, the opening 22 is formed by cutting the bottom portion 25 </ b> A in the concave portion 25 of the skin material 20.

  Next, the effect of this embodiment will be described. In the present embodiment, by pressing the non-design surfaces (the surface 25A1 of the bottom portion 25A and the surface 24A of the peripheral wall portion 24) of the skin material 20 by the pressing members 62 and 65, the standing wall portion (from the peripheral edge of the non-design surface) A recessed side wall portion 26 and a side wall portion 23) are formed. By forming such a standing wall portion, the three-dimensional shape of the skin material 20 can be maintained. That is, the skin material 20 can be formed into a three-dimensional shape. Thus, in this embodiment, when the skin material 20 is formed into a three-dimensional shape, the design surface is not hot-pressed. That is, it is possible to suppress a situation in which the design property is lowered while allowing the skin material 20 to be formed by hot pressing.

  In addition, the pressing members 62 and 65 have a shape that becomes thinner toward the upper side (opposite to the pressing direction).

  By making the pressing members 62 and 65 into a shape that becomes narrower in the direction opposite to the pressing direction, the heated pressing members 62 and 65 are formed on the non-design surface (the surface 25A1 of the bottom portion 25A and the surface 24A of the peripheral wall portion 24). When they are brought into contact with each other, it is possible to suppress a situation in which the side surfaces of the pressing members 62 and 65 (the surfaces facing the surfaces of the standing wall portions) are in contact with the surfaces of the standing wall portions (the recessed sidewall portions 26 and the sidewall portions 23). Thereby, the situation which erases the pattern which the skin material 20 originally has on the surface of a standing wall part (the recessed part side wall part 26, the side wall part 23) can be suppressed.

  Further, the skin material 20 has a plurality of non-design surfaces (in this embodiment, the surface 25A1 of the bottom 25A and the surface 24A of the peripheral wall 24), and in the hot press process, a plurality of pressing members 62, Each of the non-design surfaces of the skin material 20 is pressed by 65.

  By pressing the plurality of non-design surfaces by the pressing members 62 and 65, the standing wall portions (recessed side wall portions 26 and side wall portions 23) are formed corresponding to the respective non-design surfaces. Thereby, compared with the structure which forms only one standing wall part, it becomes easier to hold | maintain the three-dimensional shape of the skin material 20 further.

  In the present embodiment, since the skin material 20 is formed into a three-dimensional shape and then attached to the base material 16, the skin material 20 can be easily attached to the base material 16.

  In the skin material attaching step, by supplying a foamable resin material between the base material 16 and the skin material 20, the skin material 20 is attached to the base material 16 via the foamable resin material (cushion material 14). It is attached.

  In this way, the skin material 20 can be attached to the base material 16 at the same time that the foamable resin material is interposed between the base material 16 and the skin material 20 (molding the cushion material 14). .

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the said embodiment, although the instrument panel 10 was illustrated as an interior material for vehicles, it is not limited to this. Examples of the vehicle interior material include a center console lid and a door trim.

  (2) The three-dimensional shape of the skin material 20 after molding is not limited to those exemplified in the above embodiment, and can be appropriately changed. In addition, the number of non-design surfaces formed on the skin material 20 and the number of pressing members corresponding thereto can be changed as appropriate.

  (3) The configuration of the skin material 20 is not limited to that of the above embodiment, and can be changed as appropriate. For example, the structure which the thermoplastic resin is not impregnated in the skin material 20 may be sufficient. The present invention is applicable to a skin material that has natural leather and can be molded by hot pressing.

  (4) The material of the cushion material 14 and the base material 16 is not limited to what was illustrated by the said embodiment, It can change suitably.

  (5) In the above embodiment, the configuration in which the audio device 18 is accommodated in the opening 22 of the skin material 20 is exemplified, but the present invention is not limited to this. For example, an air outlet of the air conditioner may be provided in the opening 22. Moreover, the shape of the opening part 22 is not limited to a front view shape, and can be changed as appropriate.

  (6) The heating temperatures of the pressing members 62 and 65 in the hot pressing step are not limited to the values exemplified in the above embodiment, and can be changed as appropriate.

  (7) In the hot pressing step, the hot pressing is performed in a vacuumed state, but the hot pressing may be performed without performing the vacuuming.

  (8) In the above embodiment, the pressing direction of the pressing members 62 and 65 is set downward, but the present invention is not limited to this. For example, the pressing direction of the pressing members 62 and 65 may be the horizontal direction.

  (9) In the skin material attaching step of the above embodiment, the method of injecting the foamable resin material between the base material 16 and the skin material 20 is exemplified, but the present invention is not limited to this. For example, after supplying the foamable resin material to the back surface side of the skin material 20, the base material 16 may be arranged in a form covering the foamable resin material.

  (10) In the said embodiment, the structure which is not provided with the cushioning material 14 may be sufficient. That is, in the skin material attaching step, the step of supplying the foamable resin material may not be provided. As the skin material attaching step, for example, after the molded skin material 20 is set in a molding die, the molten resin constituting the base material 16 is injected into the molding die. The process etc. which attach the skin material 20 with respect to the material 16 can be illustrated. Moreover, as a skin material attachment process, what is necessary is just the process of attaching the skin material 20 to the base material 16 in the form which covers the base material 16, and the process of sticking the skin material 20 to the base material 16 etc. can also be illustrated.

  (11) In the skin material attaching step, the second molding die 70 may be closed with the base material 16 set on the upper die 81.

DESCRIPTION OF SYMBOLS 10 ... Instrument panel (vehicle interior material), 14 ... Cushion material (foamable resin material), 16 ... Base material, 20 ... Skin material, 21A ... Center surface (surrounding surface of non-design surface in skin material) , 23 ... side wall (standing wall), 24A ... surface of peripheral wall (non-designed surface in skin material), 25A1 ... surface of bottom (non-designed surface in skin material), 26 ... recessed side wall (standing wall), 62 65 ... Pressing member

Claims (4)

Including a heat press step of forming the skin material into a three-dimensional shape by pressing the skin material having natural leather with a heated pressing member;
In the hot press process,
The non-design surface of the skin material is pressed by the heated pressing member, and the non-design surface is pressed by the pressing member rather than the peripheral surface of the non-design surface of the skin material. Forming an upright wall portion that rises from a peripheral edge of the non-design surface toward the peripheral surface by forming the skin material so as to have a shape arranged on a side. A method of manufacturing the material.   The said pressing member has comprised the shape which becomes thin as it goes to the opposite side to the said pressing direction, The manufacturing method of the skin material of Claim 1 characterized by the above-mentioned. A method for manufacturing a vehicle interior material in which a skin material made of natural leather is covered with a base material,
A hot press step of forming the skin material into a three-dimensional shape by pressing the skin material with a heated pressing member;
A skin material attaching step, which is performed after the heat pressing step and attaches the skin material to the base material so as to cover the base material,
In the hot press process,
The non-design surface of the skin material is pressed by the heated pressing member, and the non-design surface is pressed by the pressing member rather than the peripheral surface of the non-design surface of the skin material. A vehicle characterized by forming an upright wall portion that rises from a peripheral end of the non-design surface toward the peripheral surface by forming the skin material so as to have a shape arranged on a side. Of manufacturing interior materials for automobiles. In the skin material mounting step,
The vehicle according to claim 3, wherein the skin material is attached to the base material via the foamable resin material by supplying a foamable resin material between the base material and the skin material. Of manufacturing interior materials for automobiles.

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